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Finding the Fourth Proportional to 3,087.70, 4,631.01 and 896.20

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Solution

The fourth proportional to 3,087.70, 4,631.01 and 896.20 is: 1,344.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.70 : 4,631.01 = 896.20 : x
  2. Step 2: Convert to fraction form
    3,087.70/4,631.01 = 896.20/x
  3. Step 3: Cross multiply
    3,087.70x = 4,631.01 × 896.20
  4. Step 4: Simplify right side
    3,087.70x = 4,150,311.16
  5. Step 5: Solve for x
    x = 4,150,311.16/3,087.70
  6. Step 6: Final answer
    x = 1,344.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.